Tool holder



Sum@ 1o, 1,924. 1,497,479

\ F. BOOTH TOOL HOLDER Filed Feb. 24, 1925 2 Sheets-Sheet 1 JW lllY H Mmmm@ 6 MM/3% F. BOOTH TOOL HOLDER June l0, 1.924.

Filed Feb. 24, 1925 2 Sheets-Sheet 2 Patented ...inne 1G, 192A.

gaat@ TOOL HOLDER.

Application filed February 24, 1923. Serial No. 620,949.

To all whom t may Concern:

lie it known that l, Fnnnnnron Boeri-r, a citizen ofthe United States, residing in hflichigan City, in the,`county of Laporte and State of indiana, have invented'certain new and useful improvements in Tool Holders. ot which the following is a speciication. f

The invention relates totoolholdersot the class inl which a handle is provided .with means Jfor holding a screw driver, drill, or other tool in such manner that the holder may be rotated by pressing upon the handle to reciprocate it. It particularly relates to tools of the hind shown Ein my prior Patents No'. 1.183.425, @tiny it, 191mm 1,330,053,

oifFeb. 10, 1920. y

An object of the invention is to provide improved means for rotating the Vtool in either direction as desirechor for holding it against `rotation when in any position.

Another object 4 is to provide a vmeans for holding` the 4 parts .rigid whenvin fully extended position, or when in fully retracted position.

Another object is to provide ymeans for preventing .inadvertent change of the -va'- rions adjustments.

Another object is .to provide improved means for preventing rotation of the tool upon freturn movement of the parts.

Other objects will :be apparent from the following Ydetailed description and the appended claims. l

In the drawings:

Figure 1 is a perspective View of the tool.

VFigure 2 is a longitudinal section thereof.

Figure 3 is a separatedview of details of the l clutch mechanism.

Figure lis a longitudinal rsection of a portion f the tool, on a larger scale than Fig ure 2.

Figures 5, 6 .and 7, are cross sections on the lines -.-5 G-eG, and 7-.-7, respectively.

Figures 8 and .9 show modifications of the end bearing members for the spindle. Each of vthese figures shows two modications, one above and the other below the dot and :dash line.

Figurel() is a modification ot one end of thecasing.

A handle 1 has secured therein a metallic tubular casing 2 within which is the tool actuating mechanism. In the outer end of this casing is fitted a bearing plate'3 and an end plate or cap 1 is fastened to the casing 2 by screws 5 which pass Vthrough the cap and casing and intothebearing plate 3; Between the cap and bearing plate is placed a felt or similar packing .6 which prevents accessof dustand egress of lubricant.

The outer reduced end of the spindle y7 is provided with a reduced portion upon which is mounted the body 8 of a chuck device. The tool 9 'has a milled slot `10 to engage a corresponding tongue 11 on the end of the spindle. The tool is also provided `with a shoulder 1 2 against which bears a 4nut'l which is screwed into an linternally threaded portion of the body 8. Thelcustomaryloose sleeve 14 encloses the body as shown.

AThe reduced inner end 15 ofthe spindle 7V is carriedfby abearing which slides within the tube'2 `andis particularly shown in igures L and 5. This comprises inner and outer raceways 16 and 18 between which are rollers 17. lnclosing the whole is va shell 19 which acts asaretainer. An end piece 2 0 is 'fastened in place 'by a .screw orsimilar Jfastening member near the end 21 ,of the spindle. Between the down turned portion of the shell 19 and the shoulderformed by the reduced portion of the lspindle 7 are mounted 'hardened thrust washers22 having between them a vball retainer 23 fcarrying balls 24. This mounting permits .thesp'indle to turn freely, since thes'ide thrust istaken by the roller bearings 17 andthe en'd thrust by the balls 241. The shell v1.9 fits-smoothly' within ythe tube 2 andslides freely along the same.-

rFastened to theinside Of the tubularcasing 2 is a driving rack y2 5 ofthe general type shown in my prior patents, and with this -raclmesh two gears2G-.and 27 the gear 26 being a Vleft hand gear and 27 a right hand gear. The gears are mounted'freely on the spindle andheld in position in the following manner. The gear 27-bears at one end againstone of the hardened :washers 22 vand yat the other end against a shoulder on the spindle. The other end Yof the gear 26 abuts against a bearing 28 which lfits tightly on the spindle.

A shifting member 31 shown in perspective 'in v'Figure ,Sis Slidably mounted .011 the spacingsleeve between the .twogears A.

key 32 fits in a longitudinal slot 33 -in the spindlel yand has a projection 34, passing through a slot 35 -in the sleeve BOand-tting within anannular groove 36 von the inside kof the shifting member 3 1. The lrey must rotate with the spindle, while the shifting member 31 only has a longitudinal movement on the sleeve 30, and the groove 36 is necessary to permit rotary movement of the key independent of the member 31 but to insure that the key will move longitudinally with said member. The member 31 is provided with a cut out 37 whichfits over the driving rack 25, and with a eut out 39 for a purpose hereinafter mentioned.. The member 31 has a projecting sharp edge 40. i

The key 32 is springpressed outwardly by a. spring 41 in the slot 33 and is adapted to couple the spindle to either or both of the gears 26 and 27. These gears are provided with internal ratchet teeth 42 having straight faces on one side and inclined faces on the other. lhen the parts are in the position shown in Figure 4, the key is engaged with the teeth of the gear 27, and

a relative endwise movement of handle and casing will cause the key 32 to engage the straight sides of the teeth 42 so that. the turning of the gear 27 will through this 'key rotate the spindle in a right hand direction. If the key is shifted by movement of the member 31 to a position in which it engages only the gear 26, a left hand movement of the tool will be obtained. Alf the key is moved to an intermediate position wherein it engages both gears 26 and 2T, the parts'will be rigidly held and the tool be used in the ordinary manner. Upon return movement. of the parts, no matter which gear the key 32 engages, the key will contact with the slantingsides of the ratchet teeth 42 and be cammed out of their path against the tension of the spring 41,

.thus permitting said return movement yto take place without any turning of the tool spindle. It may be here noted that the key may be set to engage both gears and make a rigid tool when the parts are fully extended, fully contracted, or in any intermediate position,.thus enabling the length of the tool to be varied within considerable limits. The shifting member 31 and key 32 are moved to either of the three positions in the following manner. A rack bar 43 is carried by two headed screws or rivets 44 and 45 which pass through slots in the bar adjacent its ends. Springs 46 lie between the heads of the screws 44 and `45 andthe rack bar 43 and normally press it outwardly. The rack bar 43 is provided with a pin or bent lug 48 adapted to t in either of three holes A, B and C in the casing 2, and hold it in either of three positions, the parts of the other elements moving to positions designated by lines A, B and C upon Figure 2. The rack bar is also provided with a finger piece 49 which extends through a Slot 47 in the. casing 2, the slot and finger piece being protected against accidental displacement by a guard plate 5() provided with an opening permitting engagement of the linger piece by the. finger. The rack teeth of the bar when pressed inwardly by the finger piece 49, will engage the sharp edge '40 of the member 31 and said member can thereby be moved to either" of. the three positions designated. Said rack bar 43 moves freely over the shifting member 31 at all times.

Through a. circumferential slot in the casing 2 projects the finger piece 52 of a bar 53 of considerable extent as shown in Figure 2, which does not permit longitudinal movementfbut can have circumferential movement within the limits of the slot. A guard plate 54 covers the finger piece and has an opening 55 suficient to permit the finger to engage and move the bar 53 by means of the finger piece 52. lVhen the parts are in one position the bar passes through the cut out 39 of the shifting member 31, a cut out 56 in the shell 19, and a cut out 60 in the niember 28, and in no way affects the operation of the tool.

If the parts are fully extended and the bar is moved circumferentially to its second position, it will prevent return movement as it will engage the shell 19 as shown in Figure 4. Similarly, when the parts are in contracted position and the bar 53 `is moved to the second position, it will then prevent relative endwise movement of the parts by contacting with thel member 28. therefore provides a second means for holding the parts in fully extended or in fully contracted position.

Figures 8 and 9 show certain modifications in lthe bearing for the end of the spindle, and to save space, the upper and lower halves of each figure show modified forms. In the upper half ofFigure 8, the inner race way and rollers are the same as in the firstform, but the outer raceway 18l is a cylinder, and the shell 19a is machined with a. flange touching the reduced portion 15 ofthe spindle and against the washer 22.

In the lower half of Figure 8, the inner raeeway is imchanged, but a slightly different form of roller 17" is employed and the outer raceway 18" has a flange engaging the end of the roller and the washer 22, while the shell 19"v is a simple cylinder.

In the upper half of Figure 9, the inner raceway is the same, but the outer raceway 18c has an outwardly projecting flange at one end and an inwardly projecting flange at the other, the latter taking the plaeeof one of the washers 22 and also' providing means wherein the inner ends of the rollers 17C are pivoted, their outer ends bearing in a washer 61.

In the lower half of Figure 9, the inner raceway 16 and washer 61 are as in the preceding modification, while the outer raceway 18d and the shell 19d resemble those of the This bar' lill) lli Cil

first form in Figure 4, exceptithatthe flange ot' the shell takes the place `of one of the Balls are used in the place fof a Washer 62 is yplaced absorbent packing/6a.

The operation oit the device is believed `to be clear from the above description. The member 28 will also be provided With vout outs for the driving rack 25 and theshifting rack 43 which have not been particularly .identified on the drawings to avoid confusion. o

It will be noted that the invention provides a single clutch element which canbe moved to engagewith either or both gears, and thus cause the spindle to rotate in either direction, or hold it against rotation vin any position. A separate means vis also provided to prevent the operation of the spindle When in either fully extended or fully contracted position. The guards for the finger pieces 4 9 and 52 are of importance in preventing accidental displacement of the mechanism when set as desired. Experience demonstrates the tool to have over twice the efficiency of any other automatic tool of this type.

Obviously various detail changes can be made Without departing from the spirit of the invention, which is'to be regarded as limited only by the scope of the appended claims.

I claim as my invention:

1. A tool holder comprising a casing, a spindle mounted for rotation and endvvise movement in said casing, a rack bar extending longitudinally Within said casing, gears mounted to rotate on said spindle and engaging said rack, a clutch element on each of said gears, a clutch element carried by the spindle, and means for moving said spindle clutch element into engagement With either ofsaid gear clutch elements.

2. A tool holder comprising a casing, a

4spindlemounted for rotation and endwise movement in said casing, a rack bar extending longitudinally Within said easing, gears mounted to rotate on said spindle, and engaging said rack, a clutch element on each of said gears, a clutch element carried by the spindle, and means for moving said spindle clutch element into engagement With either of said gear clutch elements or vvith both at one time.

3. A tool holder comprising a casing, a spindle mounted for rotation and endWise movement in said casing, a rack bar extending longitudinally Within said casing,'right and left handed gears mounted to rotate on saidspindle and engaging said raelga clutch element-on each of said gears, a clutch element slidably carried by the spindle, and a slidableibut non-rotatalile member for moving the last clutch element into engagementl Withfeither of the gear clutch elements.

4. A tool holder comprising a casing, a spindle mounted for rotation and endwise movement insaid casing, a rack bar extending longitudinally within said casing, gears mounted to rotate on said spindle and engaging said rack, an internal clutch element on each-of Vsaid gears, a clutch element slidably carried by said spindle intermediate said gears, and means for sliding the same Within either gear to engage its clutch element and thereby lock it to the spindle.

5. A `tool holder comprising a casing, a spindle mounted for rotation and endwise movement in said casing, right and left hand gears mounted on said spindle for rotation thereon, driving means for said gears meshingtherewith, clutch elements on said gears, and a single elutchfelement `for engaging the first named clutch elements to lock either or both gears to the spindle.

6. A tool holder comprising a casing, a spindle mounted for rotation and endvvise movement in said casing, right and left hand gears mounted on said spindle for rotation thereon, internal clutch teeth on each of said gears, and a single clutch element slidably carried bythe spindle and movable to engage the clutch teeth of either or both gears.

7. A tool holder comprising a easing, a spindle mounted for rotation and endWise movement in said casing, gears mounted on said spindle for rotation thereon, driving means for said gears meshing therewith, a movable clutch element for locking either of said gears to the spindle, and means for preventing accidental displacement of said element when adjusted.

8. A tool holder comprising a casing, a spindle mounted for rotation. and endwise movement in said casing, gears rotatably mounted on said spindle, driving means for said gears, means for clutching either gear to the spindle, manual means for opera-ting the same., an-d an overlying guard plate provided With a finger opening for preventing accidental displacement of said manual means.

9.' A tool holder comprising a casing, a spindle mounted for rotation and endWise movement in said casing, means vvhereby the endwise movement of the spindle produces its rotation, means for locking the spindle against rotation and consequently against e-ndwise movement at extended, retracted, or any intermediate position, and a separate means for locking the spindle against end- Wise movement in fully extended or fully retracted position.

lll)

10. A tool holder comprising afcasing, a.

spindle mounted for rotation and endWise '12. A tool holder comprising` a easing', aL

spindle mounted for rotation and endwise movement 1n said casmg, gears having m'- ternal clutch teeth mounted to rotate on the spindle` a sleeve. spacing' apart said gears.'

al slidable clutch member carried by said spindle, and slidable means on said sleeve adapted to move the clutch member into engagement with the clutch teeth ot either 13. A tool holder comprising a casing, a spindle mounted for rotation and endWise movement in said casing, gears having internal clutch teeth mounted to rotate on said spindle, a sleeve spacingzr` apart said gears, a key slidably mounted in a slot in the spindle, and means slidable. on said sleeve and adapted to move said key the clutch teeth of either gear.-

14. A tool holder Comprising` a casing, a

spindle mounted for rotation and endivise movementin the casing, gears having internal clutch teeth mounted to rotate on said spindle, a key slidable 1n' a slot in the spinA die, a spring for pressing the key into eutQagement with the `'clutch teeth, and means for sliding' the key into position to engage the clutch teeth of either gear.

In testimony whereof, I have hereunto subscribed my name.

FREDERICK BOOTH. Titnesses Dn. M F. ANDERSON, KATHERINE SPEEKEEN.

into engagement withy 

